Comments about Champion Sports M290 Set of 3 Stake Down Foam Bases (14"x14"x2"):

The product only comes with 3 spikes, so you will have to be very creative as to how you will anchor these. Sports Authority sent 3 more after my complaint. Make sure you do not hammer the straps that hold the spikes as it rips quite easily. It does set up quickly and is sturdy once anchored properly.